Apparatus for preserving wood.



N0. 645,793. Patented Mal. 20, |900. C. J. DDYLE.

APPARATUS FOR PRESERVING WOOD.

(Application filed June 3, 1899.) (N 0 M n d el Wfnean/edf, f

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CHRISTOPHER I. DOYLE, OF PHILADELPHIA, PENNSYLVANIA.

APPARATUS FOR PRESERVING WOOD.

SPECIFICATION forming part of Letters Patent No. 645,793, dated March 20, 1900. Application led June 3, 1899. Serial No. 719,327. (No model.)

To ct/Z whom it may concern.-

Beit known that I, CHRISTOPHER J. Dornn, a citizen of the United States, and a resident of the city of Philadelphia, State of Pennsyl- Vania, have invented certain new and useful Improvements in Apparatus for Treating Wood, the., with Fireproong Material, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention has relation to certain improvements in an apparatus for treating wood and other cellular substances with reproofing material, and has for one object t0 provide a simple and inexpensive form of apparatus by means of which the liquid material may be forced through the wood or other substance with an even pressure and without any jarring, thereby preventing,r any fracture or injury to the fiber.

Another object of my invention is to pr0- vide an apparatus of this character having one or more receiving-tanks for the material to be treated and a supply-tank for the (ireproofing liquid connecting the same in such a manner as-to feed one or all of such receivers in a uniform manner; also, in providing means for exerting pressure in the supplytank, so that the liquid may be forced up through the material in the receiver under a high but uniform pressure.

A still further object of my invention is to provide an apparatus so constructed that the wood or other substance being treated can be withdrawn from the receivers and recharged without removing the reproong liquid therefrom; also, in providing meansfor regulating the pressure of the liquid and the degree of heat to be maintained in the receivingtanks.

The various uses and advantages arising from my improved construction will be more readily apparent by referring to the accompanying drawings in connection with the detailed description herewith submitted.

In the said drawings, which illustrate my invention in sectional elevation, A designates 'the receiving-tank, which is substantially cylindrical in form and stands in an upright position, being provided at its lower end with suitable supporting-legs o.. The receiver A may be single or a number may be employed,- `in which latter casethey wouldbe arranged side by side, each having a feed-pipe, as B, connected by a T with the main supply-pipe C;

The supply tank or reservoir'D is substantially cylindrical in form and is arranged,V

preferably, at an elevation above the receiver A and is supported by the pipe C, which enters its bottom, together with such other structure as lmay be found necessary. In the upper end of the tank D is a pipe d, connecting with a compressed-air reservoir. (Not shown.) A suitable cut-off valve d is provided in this pipe for controlling the admission of the compressed air.

To one side of the pipe d is a supply-pipe D', provided with a valve d2 and a funnelshaped top d3 for feeding the supply-tank D f with the fireproofing liquid. The lower part of the tank D is provided with a sight-gage d4 for the purpose of showing the height of the liquid in the tank, while they upper portion of the said tank is providedwith a pressure-gage d5 for registering the pressure applied in the tank and safety-valve d6. In the pipe C, I provide a cut-0E valve c for controlling the supply of the liquid'from the tank D to the receivers A.

The receiverA is provided at its upper end with an air-tight cap a,.which may be hinged at one side, as at a2, and provided upon its other sidewith a suitable locking device. An air-cock a3 is located in the central part of this cap for letting the air out of the receiver A when the liquid is admitted under pressure. A sight-gage b is provided in the upper end of the receiver A for showing the height of the liquid, and on the opposite side I provide a safety-valve b. Apressure-gage b2 is also provided for this cylinder for registering the amount of pressure exerted in the receiver. This should of course register with the gage d5 on the supply-tankD, as the pressure in both chambers would be about the same. In the lower part of the receiver A, I provide a thermometer b?, of any well-known construction, for showing the temperature of the liquid in the said receiver. A drain-cock b3 is provided in the lower part of the receiver.

In the lower part of the receiver A, I provide a perforated partition B2, supported on IOO suitable flanges b4, the said partition forming a supporting-base upon which the'timbers or other substances to be treated rest. In the chamber B, formed below the partition B2, I provide a coil of pipe E, which is connected with a source of steam-supply and is adapted to hea-t the liquid as it enters the chamber B.

The feed-pipe F connects the bottom of the receiver Awith the pipe B, which is connected with the main supply-pipe C. A check-valve f is provided in the pipe B for preventing the return of the heated liquid from the receiver A, and a cut-off valve f' is provided in the end of this pipe for drawing off the liquid from the receiver A. A cut-olf valve f2 is also provided in the pipe B for regulating the supply of liquid from the main pipe C to the reservoir A. If a series of receiving-tanks, as A, are used, each of said receivers would be provided with a feed-pipe corresponding to B, entering into a T, as F3, which connects with the main supply-pipe C, each of said pipes B being provided with a cut-off valve f2, so that the supply could be shut ott' from any one of the series of receivers without disturbing the supply of the others.

In operation the wood or other substance to be treated is placed in the receiver A in a ver- ,tical position, the lower ends resting upon the partition B2 and completely inclosed therein, the cap a being closed and locked in its closed position. The supply-tank D 'is then filled through the medium ot' its feed-pipe D and the valve c in the pipe C opened, also the valve f2 in the pipe B, thus admitting a flow of the ireprooiing material from the tank D into the receiver A. After the liquid has risen to a point sufficient to partly immerse the wood or other substances in the receivers A the compressed-air supply is admitted in the supply-tank D through the medium of the pipe d, the pressure varyingr from two to three hundred pounds. As the liquid rises in the receiver under pressure the air in the upper portion of the said receiver is compressed and an air-cushion maintained which prevents the liquid from rising too high in the receiver and admits of the said liquid being forced up through the wood, dac., longitudinally in an even and uniform manner in line with its grain and without any jarring or pumping effect, thereby preventing the fracture of the fiber and insuring the complete saturation of the wood or other material in the receivers. The pressure -gages d5 and b2 will show the amount of pressure both in the supply-tank and the receiver, and the safety-valves de and b prevent too high a pressure being reached. The sight -gages d4 and b, provided, respectively, in the supply-tank D and the receiver A, show the height of the liquid in each of these chambers, and the thermometer b5 shows the temperature of the liquid in the receivers, which should be at a point belov7 boilingsay I300-this temperature of course being regulated by controlling the amount of steam which enters the steam-coil E. After the wood or other material in the receivers has become thoroughly saturated the liquid-supply is cut olf by means of the valve c in the pipe O and the cap a in the top of the receiver unlocked and opened and the wood or other material removed from said receivers. The receiver can then. be relilled without drawing olf the liquid remaining therein and the valve c turned on and the operation repeated, as heretofore described. The supply-tank D should always contain a sufficient quantity of the liquid to overcome that which is absorbed by the material being treated in the receivers.

' I am aware that numerous devices have heretofore 'been invented and described for forcing ireproofing and other liquids into Wood and fibrous material for fireprooling and other purposes and do not claim the same broadly, my invention residing in my improved apparatus for accomplishing the same, as hereinafter particularly claimed.

Having thus described myinvention, what I claim, and desire to secure by Letters Patent, is-

The combination of a vertically-disposed receivingtank, an air-tight chamber located in the upper portion of said receiver, an aircock for said chamber, a removable air-tight cap provided in the top of the receiver, a heating-chamber located in the bottom of the receiver, a perforated partition between the heating chamber and the receiver proper adapted to support the material to be treated, a steamcoil located in the heating-cl1amber, a supply-reservoir arranged in close proximity to the receiver, a conduit for compressed air entering the top of said supply-reservoir, a feed-pipe connecting the supply-reservoir with the bottom of the receiver and cut-ofi' valve located in the feed-pipe as and for the purposes specified.

In witness whereof I have hereunto set my hand this 1st day of June, A. D. 1899.

CHRISTOPHER J. DOYLE. llitnesses:

BENJ. F. PERKINS, HORACE PET'rrr.

IOO 

